A Gibbus deformity is a form of structural kyphosis, where one or more adjacent vertebrae become wedged. Gibbus deformity can be a sequela of advanced skeletal tuberculosis and is the result of collapse of vertebral bodies.  This can in turn lead to spinal cord compression causing paraplegia. 
A Gibbus deformity may result from the sail vertebrae associated with cretinism, the childhood form of hypothyroidism. It is also seen with tuberculosis and certain congenital syndromes, including achondroplasia.
- Kasper D.L. et al., Harrisons principles of internal medicine, 16.ed, 2005 p.958
- Davidson's Principles and Practice of Medicine, 20th Ed, 2006.
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